Energy conversion and deposition behaviour in gravitational collapse of granular columns
文献类型：期刊论文
| 作者 | Huang Bo-lin; Wang Jian; Zhang Quan; Luo Chao-lin; Chen Xiao-ting |
| 刊名 | JOURNAL OF MOUNTAIN SCIENCE
 |
| 出版日期 | 2020 |
| 卷号 | 17期号:1页码:216-229 |
| ISSN号 | 1672-6316 |
| 关键词 | Granular columns Rock collapse Collapse experiments Energy conversion Deposit sequence Deposit prediction |
| DOI | 10.1007/s11629-019-5602-9 |
| 文献子类 | Article |
| 英文摘要 | The high-density gravitational collapse of granular columns is very similar to the movements of large collapsing columns in nature. Based on the development of dangerous columnar rock mass in fields, granular column collapse boundary condition in the physical experiments of this study is a new type of boundary conditions with a single free face and a three-dimensional deposit. Physical experiments have shown that the mobility of small particles during the collapse of granular columns was greater than that of large particles. For example, when particle size was increased from 5 to 15 mm, deposit runout was decreased by about 16.4%. When a column consisted of two particle types with different sizes, these particles could mix in the vicinity of layer interfaces and small particles might increase the mobility of large particles. In the process of collapse, potential and kinetic energy conversion rate is fluctuated. By increasing initial aspect ratio a, the ratio of the initial height of column to its length along flow direction, potential and kinetic energy conversion rate is decreased. For example, as a was increased from 0.5 to 4, the ratio of maximum kinetic energy obtained and total potential energy loss was decreased from 47.6% to 7.4%. After movement stopped, an almost trapezoidal body remained in the column and a fanlike or fan-shaped accumulation was formed on the periphery of column. Using multiple exponential functions of the aspect ratio a, the planar morphology of the collapse deposit of granular columns could be quantitatively characterized. The movement of pillar dangerous rock masses with collapse failure mode could be evaluated using this granular column experimental results. |
| 电子版国际标准刊号 | 1993-0321 |
| 语种 | 英语 |
| WOS记录号 | WOS:000512076900016 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/46729]  |
| 专题 | Journal of Mountain Science_Journal of Mountain Science-2020_Vol17 No.1 |
| 推荐引用方式 GB/T 7714 | Huang Bo-lin,Wang Jian,Zhang Quan,et al. Energy conversion and deposition behaviour in gravitational collapse of granular columns[J]. JOURNAL OF MOUNTAIN SCIENCE,2020,17(1):216-229. |
| APA | Huang Bo-lin,Wang Jian,Zhang Quan,Luo Chao-lin,&Chen Xiao-ting.(2020).Energy conversion and deposition behaviour in gravitational collapse of granular columns.JOURNAL OF MOUNTAIN SCIENCE,17(1),216-229. |
| MLA | Huang Bo-lin,et al."Energy conversion and deposition behaviour in gravitational collapse of granular columns".JOURNAL OF MOUNTAIN SCIENCE 17.1(2020):216-229. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。